Rei Ayanami but not the one you remember. This version got hit with some serious breast expansion, like someone pumped her full of helium and forgot to stop. The whole shy pilot thing is gone, replaced by this weirdly eager sex doll who just wants to get railed in every position the game can manage. Doggystyle, girl on top, blowjobs that look more like she's trying to unhinge her jaw. The animation is janky as hell, frames skipping around like a flipbook drawn by someone who's never seen a human body move.
The bikini stays on most of the time which is a choice. Not a good one. You'd think with all the emphasis on her massive tits they'd let them breathe but no, the swimsuit just stretches in this uncanny way that makes the whole thing feel like a bootleg figure come to life. There's this one anal scene where the physics just give up entirely and her body clips through itself. I laughed. Not sure that was the intended reaction.
Flying tree frog. That's a tag. I have no idea what it means and I played through every scene twice looking for amphibians. Nothing. Maybe it's some inside joke from the f-series games or maybe I'm just not weeb enough to get it. The cumshot effects are whatever, standard hentai splashes that land in the same three patterns regardless of angle. Rei's pussy is rendered with this weird glossy texture that makes it look like a wet gummy candy. Actually that's kind of hot in a gross way. The whole thing runs in browser so you don't have to commit to keeping it on your hard drive which is probably for the best. I kept clicking through dialogue that was clearly machine translated, lines like "give sex to Rei" that sound like a caveman wrote them. Still fapped though.